JP6947393B2 - Bag-making and packaging machine and bag-making and packaging system - Google Patents

Description

The present invention relates to a bag-making wrapping machine and a bag-making wrapping system.

Conventionally, a bag-making and packaging machine is known in which a packaging material is filled with an object to be packaged and sealed to form a bag. For example, in Patent Document 1, the thickness of a package (bag) is detected by a thickness detection sensor, and the displacement amount of the air bleeding plate is controlled based on the detection signal of the thickness detection sensor to control the thickness of the package. The packaging machine to be used is described.

Japanese Patent No. 3904309

In general, in a bag-making and packaging machine, when the formed bag is to be automatically and neatly packed in a box at a later stage, it is desirable to make the thickness of the bag uniform. In this respect, there is still room for improvement in the bag-making and packaging machine described above.

Therefore, an object of the present invention is to provide a bag-making wrapping machine and a bag-making wrapping system capable of making the thickness of the formed bag uniform.

The bag-making and packaging machine of the present invention is a bag-making and packaging machine that fills a packaging material with an object to be packaged and seals it to form a bag. The control unit is provided with a control unit for controlling the bag, and the control unit acquires thickness information related to the thickness of the bag, which is information obtained in the latter stage of the bag making and packaging machine, and is based on the result of statistically processing the thickness information. Controls the operation of the thickness adjustment unit.

In this bag making and packaging machine, the thickness of the bag is adjusted based on the result of statistically processing the thickness information. Therefore, it is possible to effectively control the thickness of the formed bag and make the thickness of the formed bag uniform.

In the bag-making and packaging machine of the present invention, when the control unit determines from the thickness information of a group of bags including a plurality of bags that the thickness state of a predetermined number or more of the bags in the group of bags is abnormal, the control unit is concerned. The operation of the thickness adjusting unit may be controlled according to the determination result. According to this configuration, the thickness of the bag can be adjusted by the thickness adjusting unit (hereinafter, also simply referred to as “thickness adjustment”) in consideration of noise or variation included in the thickness information.

In the bag-making and packaging machine of the present invention, the control unit controls the operation of the thickness adjusting unit so that the thickness of the bags increases when it is determined that the thickness of a predetermined number or more of the bags is thin in a group of bags. You may. When it is determined that the thickness of a predetermined number or more of the bags among the plurality of bags is thin, it is found that there is a high possibility that the thickness adjustment to increase the thickness of the bags is necessary. Therefore, according to this configuration, it is possible to effectively adjust the thickness to increase the thickness of the bag.

In the bag-making and packaging machine of the present invention, the control unit may control the operation of the thickness adjusting unit so that the thickness of the bag is reduced when it is determined from the thickness information of the bag that the thickness of the bag is thick. If it is determined that even one bag is thick, it is found that there is a high possibility that a thickness adjustment for reducing the thickness of the bag is necessary. Therefore, according to this configuration, it is possible to effectively adjust the thickness to increase the thickness of the bag.

In the bag-making and packaging machine of the present invention, the control unit may calculate a moving average of the bag thickness from the thickness information and control the operation of the thickness adjusting unit based on the calculated moving average. According to this configuration, the thickness can be adjusted in consideration of the variation included in the thickness information.

In the bag-making and packaging machine of the present invention, the control unit may control the operation of the thickness adjusting unit so that the thickness of the bag increases or decreases by a minute amount. Since the thickness information is obtained in the latter stage of the bag making and packaging machine, there is a delay until the result of adjusting the thickness of the bag by the thickness adjusting unit is reflected in the thickness information. Therefore, by increasing or decreasing the thickness of the bag by a minute amount, it is possible to suppress the adverse effect caused by the delay from affecting the thickness adjustment as compared with the case where the thickness of the bag is greatly increased or decreased by a certain amount at one time. ..

In the bag-making and packaging machine of the present invention, the control unit may control the operation of the thickness adjusting unit so that the thickness of the bag becomes the target thickness. According to this configuration, the thickness of the formed bag can be quickly made uniform.

In the bag-making and packaging machine of the present invention, the control unit corrects the control amount of the thickness adjustment unit according to the correction value, and the correction value is based on a preset set value or a past control history of the control unit. It may be a learning value obtained by machine learning. According to this configuration, it is possible to accurately realize the rapid uniformization of the thickness of the bag.

In the bag-making and packaging machine of the present invention, when the control unit determines from the thickness information that the bag is poorly sealed, the thickness information may be ignored. It is found that poor sealing of the bag is often caused by an abnormality in a portion other than the thickness adjusting portion, and occurs regardless of the presence or absence of the thickness adjustment. Therefore, when it is determined that the bag is poorly sealed, the thickness information is ignored, so that information unnecessary for adjusting the thickness of the bag can be excluded.

In the bag-making and packaging machine of the present invention, the control unit may execute interval control that ignores the thickness information of a certain number of bags created immediately after controlling the operation of the thickness adjusting unit. According to this configuration, it is possible to control the operation of the thickness adjusting unit based on the thickness information considering the above-mentioned delay (thickness information excluding the one that does not reflect the result of the immediately preceding thickness adjustment). Become.

The bag-making and wrapping system of the present invention includes the above-mentioned bag-making and wrapping machine and a thickness information acquisition unit which is arranged after the bag-making and wrapping machine and acquires thickness information.

Since the bag-making and wrapping system is also provided with the bag-making and wrapping machine, it is possible to effectively control the thickness of the formed bag and make the thickness of the formed bag uniform.

According to the present invention, it is possible to provide a bag-making wrapping machine and a bag-making wrapping system capable of making the thickness of the formed bag uniform.

FIG. 1 is a perspective view showing a bag-making and packaging system according to an embodiment. FIG. 2 is a perspective view showing a schematic configuration of a bag making and packaging unit. FIG. 3A is a schematic view for explaining an operation example of the lateral sealing mechanism. FIG. 3B is a schematic diagram showing a continuation of FIG. 3A. FIG. 3 (c) is a schematic diagram showing a continuation of FIG. 3 (b). FIG. 4A is a schematic diagram showing a continuation of FIG. 3C. FIG. 4B is a schematic diagram showing a continuation of FIG. 4A. FIG. 5 is a block diagram showing a main part of the bag making and packaging system. FIG. 6 is a diagram showing an example of thickness information acquired by the seal checker. FIG. 7A is a diagram showing another example of the thickness information acquired by the seal checker. FIG. 7B is a diagram showing still another example of the thickness information acquired by the seal checker.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, the same or corresponding parts are designated by the same reference numerals, and duplicate description will be omitted.

The bag-making and packaging system 1 shown in FIG. 1 is a system that measures a certain amount of a packaged object such as food and packages the constant amount of the packaged object. The bag-making and packaging system 1 includes a combination weighing machine 2, a bag-making and packaging machine 3, and a seal checker (thickness information acquisition unit) 4.

The combination weighing machine 2 weighs the object to be packaged from the outside with a plurality of measuring hoppers, and performs combination weighing by combining the values of the weights measured by each measuring hopper so as to have a predetermined total weight. The combination weighing machine 2 supplies a certain amount of objects to be packaged measured by the combination weighing to the bag making and packaging machine 3. The type and specifications of the combination weighing machine 2 are not particularly limited, and various devices can be used.

The bag-making and packaging machine 3 is a device for packing the objects to be packaged supplied from the combination weighing machine 2. The bag making and packaging machine 3 is arranged below the combination weighing machine 2. The bag-making and packaging machine 3 fills a film with an object to be packaged that is discharged from the combination weighing machine 2 and drops, and seals the film to form a bag. The bag making and packaging machine 3 conveys the formed bag to the seal checker 4.

The seal checker 4 checks the seal status of the bag by sandwiching the bag conveyed from the bag making / packaging machine 3 from above and below with a constant pressure. The seal checker 4 detects the thickness of the bag in the sandwiched state and acquires the thickness information of the bag. The seal checker 4 is arranged at the rear stage of the bag making / packaging machine 3. The seal checker 4 has a monitor 41 that displays thickness information and the like. The seal checker 4 transmits the thickness information to the bag making / packaging machine 3. The non-defective bag that has passed through the seal checker 4 is packed in a cardboard box or the like by the boxing unit.

The thickness information is information obtained in the latter stage of the bag making / packaging machine 3 and is information on the thickness of the bag. The thickness information includes, for example, a number, a detected value of the thickness, and a determination result of the thickness (see FIG. 6). The thickness determination result is, for example, any one of "Good", "Flat", "Thin" and "Leak". “Good” is a determination result when the thickness state of the bag is appropriate, and is a result when the detected value of the thickness is within an appropriate range. “Flat” is a determination result when the thickness state of the bag is thin, and is a result when the detected value of the thickness is in a range thinner than an appropriate range. “Thin” is a determination result when the thickness state of the bag is thick, and is a determination result when the detected value of the thickness is in a range thicker than an appropriate range. “Leak” is a determination result when the bag is poorly sealed, and is a determination result when the detected value of the thickness is in a range thinner than the range related to Flat. The thickness information is not particularly limited, and may include various information as long as it is information on the thickness of the bag.

Next, the bag-making and packaging machine 3 will be specifically described.

In the following description, the front (front side) is the front side (front side) of the bag making / packaging machine 3. The back (rear side) is the back surface (back side) of the bag making / packaging machine 3. The vertical direction corresponds to the vertical direction. The left-right direction corresponds to the horizontal direction orthogonal to both the front-back direction and the up-down direction.

The bag-making and wrapping machine 3 includes a bag-making and wrapping unit 5, a film supply unit 6, a liquid crystal display 7, and a control unit 10. The bag-making and packaging unit 5 puts the packaged object in the bag at the timing when the packaged object is supplied from the combination weighing machine 2 and seals the bag. The film supply unit 6 is installed adjacent to the bag-making and packaging unit 5, and supplies the packaging film to be molded into the bag to the bag-making and packaging unit 5. A film roll around which a film is wound is set in the film supply unit 6. The film is fed from the film roll to the film supply unit 6.

The liquid crystal display 7 is a touch panel type display. The liquid crystal display 7 functions as an input device that accepts settings related to the bag making / packaging machine 3. The liquid crystal display 7 functions as an output device that displays information about the bag making / packaging machine 3. The control unit 10 is built in the main body of the bag making / packaging machine 3. The control unit 10 is a computer composed of a CPU, a ROM, a RAM, and the like. The control unit 10 controls various operations of the bag making / packaging machine 3. The control unit 10 causes the liquid crystal display 7 to display various types of information. The specific processing executed by the control unit 10 will be described later.

FIG. 2 is a perspective view showing a schematic configuration of the bag making / packaging unit 5. As shown in FIG. 2, the bag-making and packaging unit 5 includes a molding mechanism 13, a pull-down belt mechanism 14, a vertical sealing mechanism 15, and a horizontal sealing mechanism 17.

The molding mechanism 13 molds the sheet-shaped film F supplied from the film supply unit 6 into a cylindrical shape. The pull-down belt mechanism 14 conveys the tubular film F downward. The vertical sealing mechanism 15 seals the overlapping portions of both ends of the tubular film F in the vertical direction parallel to the transport direction to form the tubular film Fc. The lateral sealing mechanism 17 seals the tubular film Fc in the lateral direction orthogonal to the conveying direction to form a bag B in which the upper end portion and the lower end portion are laterally sealed. The film F and the tubular film Fc constitute a packaging material.

The molding mechanism 13 has a tube 13a and a former 13b. The tube 13a is a cylindrical member whose upper and lower ends are open. The object to be packaged C supplied from the combination weighing machine 2 is put into the opening at the upper end of the tube 13a. The former 13b is arranged so as to surround the tube 13a. The film F unwound from the film roll of the film supply unit 6 winds around the tube 13a and is formed into a cylindrical shape when passing through the gap between the tube 13a and the former 13b.

The pull-down belt mechanism 14 conveys the film F wound around the tube 13a downward while adsorbing the film F. The pull-down belt mechanism 14 includes a driving roller 14a, a driven roller 14b, and a pair of belts 14c. The pair of belts 14c are arranged so as to sandwich the tube 13a on both the left and right sides of the tube 13a, and have a mechanism for adsorbing the film F formed into a tubular shape. The pull-down belt mechanism 14 rotationally drives the pair of belts 14c by the driving roller 14a and the driven roller 14b, thereby conveying the film F formed into a cylindrical shape downward.

The vertical sealing mechanism 15 seals the film F formed into a cylindrical shape in the vertical direction (vertical direction in FIG. 2). The vertical seal mechanism 15 moves in the front-rear direction so as to approach the tube 13a or move away from the tube 13a by a drive mechanism (not shown). The vertical sealing mechanism 15 heats the overlapping portion of the film F while pressing it against the tube 13a at a constant pressure to seal the overlapping portion of the film F in the vertical direction to form a tubular film Fc.

The lateral sealing mechanism 17 seals the tubular film Fc in the lateral direction (horizontal direction in FIG. 2). The horizontal seal mechanism 17 is arranged below the molding mechanism 13, the pull-down belt mechanism 14, and the vertical seal mechanism 15. As shown in FIGS. 2 to 4, the lateral sealing mechanism 17 includes a pair of seal jaws 54, 74, a pair of ironing members 55, 75, a pair of degassing members 56, 76, and a pair of clam rollers 58. 78 and at least include.

The seal jaws 54 and 74 come into contact with each other when the tubular film Fc is laterally sealed. The seal jaws 54 and 74 have a heater (not shown) inside. The tubular film Fc sandwiched between the seal jaws 54 and 74 is heat-sealed by a heater. The ironing members 55 and 75 are plates made of an elastic material. The ironing members 55 and 75 forcibly drop the object to be packaged C inside the tubular film Fc downward by squeezing the tubular film Fc downward, and the seal jaws 54 and 74 form the object to be packaged. Avoid biting foreign matter such as C.

The degassing members 56 and 76 constitute a thickness adjusting portion 9 (see FIG. 5) for adjusting the thickness of the bag. The degassing members 56 and 76 approach each other immediately before the seal jaws 54 and 74 laterally seal the tubular film Fc and hit the tubular film Fc. As a result, the air inside the tubular film Fc is pushed upward and discharged, and the thickness of the tubular film Fc is adjusted. The clam rollers 58 and 78 hit the cylindrical film Fc before the seal jaws 54 and 74 immediately before the seal jaws 54 and 74 laterally seal the tubular film Fc, and the tubular film Fc is in a state where a slight gap is left. Is sandwiched. The object to be packaged C supplied from the combination weighing machine 2 is put into the tubular film Fc above the portion sandwiched by the clam rollers 58 and 78.

Next, an operation example of the horizontal sealing mechanism 17 of the bag making / packaging machine 3 will be described. In the state shown in FIG. 3A, the pair of clam rollers 58 and 78 are separated from each other, the pair of ironing members 55 and 75 are separated from each other, the pair of seal jaws 54 and 74 are separated from each other, and the pair of degassing members 56, 76 are separated from each other. From this state, as shown in FIG. 3B, the clam rollers 58 and 78 are close to each other, and the packaged object C weighed by the combination weighing machine 2 is supplied from above. The squeezing members 55 and 75 approach each other and begin to squeeze the tubular film Fc downward.

Subsequently, as shown in FIG. 3C, the degassing members 56 and 76 hit the tubular film Fc in close proximity to each other, and the tubular film Fc is sandwiched between the degassing members 56 and 76. As a result, the air inside the tubular film Fc is pushed upward by the pair of degassing members 56 and 76 and discharged, and the thickness of the tubular film Fc is adjusted. Then, as shown in FIG. 4A, the degassing members 56 and 76 are separated from each other, and the tubular film Fc is not sandwiched by the degassing members 56 and 76.

Subsequently, as shown in FIG. 4B, the ironing members 55 and 75 are separated from each other, and the ironing of the tubular film Fc is completed. At the same time, the seal jaws 54 and 74 approach each other and hit the tubular film Fc, and the tubular film Fc is sandwiched by the seal jaws 54 and 74. A predetermined heat is applied to the tubular film Fc by the heaters of the seal jaws 54 and 74, and the tubular film Fc is laterally sealed. As a result, a bag B having a space inside in which the object to be packaged C exists is formed in a state of being connected to the subsequent tubular film Fc below the portion laterally sealed by the seal jaws 54 and 74. Then, the laterally sealed portion of the tubular film Fc is cut laterally to separate the bag B from the subsequent tubular film Fc.

Next, the main parts of the bag making and packaging system 1 will be described.

FIG. 5 is a block diagram showing a main part of the bag making and packaging system 1. As shown in FIG. 5, the bag-making and packaging machine 3 includes the above-mentioned degassing members 56 and 76 as a thickness adjusting portion 9 for adjusting the thickness of the bag B to be formed. The seal checker 4 constitutes a thickness information acquisition unit that acquires thickness information of the bag B formed by the bag making / packaging machine 3. Each time the seal checker 4 acquires the thickness information of one bag B, the seal checker 4 transmits the thickness information to the control unit 10.

The control unit 10 controls the operation of the thickness adjusting unit 9 and controls the thickness of the bag B to be formed. Specifically, the control unit 10 controls the sandwiching time during which the pair of degassing members 56, 76 sandwich the tubular film Fc before the horizontal seal, so that the amount of gas discharged from the tubular film Fc is discharged. To increase or decrease the thickness of bag B after bag making. By increasing the sandwiching time, the control unit 10 can increase the amount of gas discharged from the tubular film Fc and reduce (thinn) the thickness of the bag B after bag making. On the other hand, by reducing the sandwiching time, the control unit 10 can reduce the amount of gas discharged from the tubular film Fc and increase (thicken) the thickness of the bag B after bag making.

The control unit 10 receives and acquires the thickness information from the seal checker 4. The control unit 10 controls the operation of the thickness adjusting unit 9 based on the result of statistically processing the acquired thickness information, and makes the thickness of the bag B formed by the bag making and packaging machine 3 uniform within an appropriate range. Control to be done. Statistical processing is processing for extracting probable information contained in data having noise, variation, and error. Statistical processing is processing for objectively grasping the attributes (characteristics) of data. Statistical processing is processing based on probability theory. Hereinafter, the processing of the control unit 10 will be described in detail.

From the thickness information of the bag group (a group of bags) including the plurality of bags B, the control unit 10 determines whether or not the thickness state of a predetermined number or more of the bags in the bag group is abnormal. The control unit 10 controls the operation of the thickness adjusting unit 9 according to the determination result.

Specifically, as shown in FIG. 6, the control unit 10 determines a bag group G for each of a certain number of bags B (five in the example in the figure) in the order formed by the bag making and packaging machine 3. .. The control unit 10 determines whether or not the thickness state of the bag B having a predetermined number or more is "Flat" in the bag group G. When the control unit 10 determines that the thickness state of the bags B exceeding a predetermined number is "Flat", the thickness of the bags B is increased (here, the thickness of the bags B is increased by a small amount). Controls the operation of the thickness adjusting unit 9.

The predetermined number is an integer of 1 or more and less than or equal to the number of bags (fixed number) that defines the bag group G. For example, the predetermined number is two. The minute amount is a sufficiently small amount with respect to the thickness of the entire bag B. The minute amount is, for example, 2 mm. A certain number, a predetermined number, and a minute amount can be set in advance according to, for example, an input from the liquid crystal display 7. The fixed number, the predetermined number, and the minute amount may be fixed values or variable values.

For example, in the example in the figure, the control unit 10 is No. 1 to No. 1. The thickness information of the bag B of 5 is sequentially received from the seal checker 4, and the bag group G1 is determined by these bags B. The control unit 10 determines that the thickness state of the bag B equal to or larger than a predetermined number in the bag group G1 is "Flat", and the sandwiching time of the degassing members 56 and 76 is increased so that the thickness of the bag B increases by a small amount. By a small amount. In addition, the control unit 10 is No. 6 to No. The thickness information of the 10 bags B is sequentially received from the seal checker 4, and the bag group G2 is determined by these bags B. The control unit 10 determines that the thickness state of the bags B equal to or more than a predetermined number is "Flat" in the bag group G2, and sandwiches the degassing members 56 and 76 so that the thickness of the bags B increases by a small amount. Reduce the filling time by a small amount. Furthermore, the control unit 10 is No. 11 to No. The thickness information of the 15 bags B is sequentially received from the seal checker 4, and the bag group G3 is determined by these bags B. The control unit 10 determines that the thickness state of the bags B equal to or more than a predetermined number is "Flat" in the bag group G3, and sandwiches the degassing members 56 and 76 so that the thickness of the bags B increases by a small amount. Reduce the filling time by a small amount.

Further, the control unit 10 determines whether or not the thickness state of the bag B is "Thick" based on the thickness information. When the control unit 10 determines that the thickness state of the bag B is "Thick", the thickness adjusting unit 9 reduces the thickness of the bag B (here, the thickness of the bag B decreases by a minute amount). Control the operation of. For example, in the example shown in FIG. 7A, the control unit 10 is No. When the thickness information of the bag B of 2 is received from the seal checker 4 and it is determined that the thickness state of the bag B is "Thick", the degassing members 56 and 76 are arranged so that the thickness of the bag B is reduced by a minute amount. Increase the sandwiching time by a small amount.

Further, the control unit 10 determines whether or not the bag B is "Leak" based on the thickness information. When the control unit 10 determines that the bag B is "Leak", the control unit 10 ignores the thickness information of the bag B. For example, in the example shown in FIG. 7B, the control unit 10 is No. The thickness information of the bag B of 2 is received from the seal checker 4, and it is determined that the thickness state of the bag B is “Leak”. In this case, the control unit 10 is No. Ignore the thickness information of bag B of 2. In addition, ignoring the thickness information of the bag B means that the thickness information is not used as the data used for the operation control of the thickness adjusting unit 9.

As described above, in the bag-making and wrapping machine 3 and the bag-making and wrapping system 1, the thickness of the bag B is adjusted based on the result of statistically processing the thickness information. Therefore, it is possible to effectively control the thickness of the formed bag B and make the thickness of the formed bag B uniform.

In the bag-making and wrapping machine 3 and the bag-making and wrapping system 1, when the control unit 10 determines from the thickness information of the bag group G that the thickness state of a predetermined number or more of the bags B in the bag group G is abnormal, the control unit 10 concerned. The operation of the thickness adjusting unit 9 is controlled according to the determination result. According to this configuration, the thickness of the bag B can be adjusted by the thickness adjusting unit 9 (hereinafter, also simply referred to as “thickness adjustment”) in consideration of noise or variation included in the thickness information.

In the bag-making and wrapping machine 3 and the bag-making and wrapping system 1, the control unit 10 increases the thickness of the bag B when the thickness state of a predetermined number or more of the bags is determined to be "Flat" in the bag group G. Controls the operation of the thickness adjusting unit 9. When the thickness state of a predetermined number or more of the bags B among the plurality of bags B is determined to be "Flat", it is found that there is a high possibility that the thickness adjustment for increasing the thickness of the bags B is necessary. Therefore, according to this configuration, it is possible to effectively adjust the thickness to increase the thickness of the bag B.

In the bag-making and wrapping machine 3 and the bag-making and wrapping system 1, the control unit 10 adjusts the thickness so that the thickness of the bag B is reduced when the thickness state of the bag B is determined to be "Thick" from the thickness information of the bag B. Controls the operation of unit 9. When it is determined that the thickness state of the bag B is "Thick", it is found that there is a high possibility that the thickness adjustment for reducing the thickness of the bag B is necessary. That is, it is found that the determination result of "Thick" is different from the determination result of "Flat", and it is highly possible that the thickness adjustment is required immediately when there is even one of them. Therefore, according to this configuration, it is possible to effectively adjust the thickness to increase the thickness of the bag B.

Since the thickness information is obtained by the seal checker 4 at the subsequent stage of the bag making and packaging machine 3, there is a delay until the result of adjusting the thickness of the bag B by the thickness adjusting unit 9 is reflected in the thickness information. Exists. In this regard, in the bag-making / packaging machine 3 and the bag-making / packaging system 1, the control unit 10 controls the operation of the thickness adjusting unit 9 so that the thickness of the bag B increases by a minute amount and decreases by a minute amount. As a result, it is possible to suppress the adverse effect caused by the delay from affecting the thickness adjustment, as compared with the case where the thickness of the bag B is greatly increased or decreased by a certain amount at one time. In consideration of the delay (assuming that there is a delay), the thickness of the bag B can be gradually increased or decreased. It is possible to prevent the thickness of the bag B from moving back and forth (vibrating) between the thickness of the "Flat" and the thickness of the "Thick" without converging on the thickness of the "Good".

In the bag-making and wrapping machine 3 and the bag-making and wrapping system 1, when the control unit 10 determines that the bag B is "Leak" from the thickness information, the control unit 10 ignores the thickness information. It is found that the poor sealing of the bag B is often caused by an abnormality in a portion other than the thickness adjusting portion 9, and occurs regardless of the presence or absence of the thickness adjustment. Therefore, when the bag B is determined to be poorly sealed (that is, "Leak"), the thickness information is ignored, so that information unnecessary for adjusting the thickness of the bag B can be excluded.

The present invention is not limited to the above embodiments.

In the above embodiment, the control unit 10 controls the operation of the thickness adjusting unit 9 so that the thickness of the bag B increases or decreases by a minute amount, but the thickness adjusting unit 10 controls the operation of the thickness adjusting unit 9 so that the thickness of the bag B becomes the target thickness. The operation of 9 may be controlled. The target thickness can be set in advance according to, for example, the input from the liquid crystal display 7. The target thickness may be a fixed value or a variable value. According to this configuration, the thickness of the formed bag B can be quickly made uniform.

In the above embodiment, the control unit 10 corrects the control amount of the thickness adjusting unit 9 (for example, the sandwiching time during which the pair of degassing members 56, 76 sandwich the tubular film Fc before the horizontal seal) according to the correction value. You may. The correction value may be a preset value or a learning value obtained by machine learning based on the past control history of the control unit 10. For machine learning, various known machine learning can be adopted. According to this configuration, it is possible to realize the rapid uniformization of the thickness of the bag B with high accuracy.

In the above embodiment, the control unit 10 may execute interval control that ignores the thickness information of a certain number of bags B created immediately after controlling the operation of the thickness adjusting unit 9. The fixed number in the interval control may be the same as the number of bags defining the bag group G (five in FIG. 6), or may be another number. The fixed number is not particularly limited, and may be a number in consideration of the above-mentioned delay. The fixed number may be a number greater than or equal to the number of bags existing between the bag B immediately after being formed by the bag making and packaging machine 3 and the bag B for which the thickness information is acquired by the seal checker 4. The fixed number can be set in advance according to, for example, the input from the liquid crystal display 7.

According to this configuration, it is possible to control the operation of the thickness adjusting unit 9 based on the thickness information considering the above-mentioned delay (thickness information excluding the one that does not reflect the result of the immediately preceding thickness adjustment). It becomes. As a result, the thickness of the bag B is increased or decreased because the thickness is not yet reflected in the thickness information due to the above-mentioned delay, although the thickness is actually already adjusted by the thickness adjustment. It is possible to prevent the baggage (unnecessary thickness adjustment).

In the above embodiment, the control unit 10 may calculate the moving average of the thickness of the bag B from the thickness information and control the operation of the thickness adjusting unit based on the calculated moving average. According to this configuration, the thickness can be adjusted in consideration of the variation included in the thickness information.

In the above embodiment, the seal checker 4 is provided as the thickness information acquisition unit, but the thickness information acquisition unit is not limited to the seal checker 4. If the thickness information of the bag B can be acquired in the subsequent stage of the bag making / packaging machine 3, various devices or devices can be used as the thickness information acquisition unit.

1 ... Bag making and packaging system, 3 ... Bag making and packaging machine, 4 ... Seal checker (thickness information acquisition unit), 9 ... Thickness adjusting unit, 10 ... Control unit, B ... Bag, C ... Packaged object, F ... Film ( Packaging material), Fc ... Cylindrical film (packaging material), G, G1 to G3 ... Bag group (a group of bags).

Claims (11)

A bag-making and packaging machine that fills a packaging material with an object to be packaged and seals it to form a bag.
A thickness adjusting unit that adjusts the thickness of the bag,
A control unit that controls the operation of the thickness adjusting unit is provided.
The control unit
The information obtained in the latter stage of the bag-making and packaging machine, which is the thickness information regarding the thickness of the bag, is acquired.
Based on the acquired thickness information, it is determined whether or not there are a predetermined number or more of the bags having an abnormal thickness state of the bags in a group of bags including the plurality of bags, and the result of the determination is obtained. A bag-making and packaging machine that controls the operation of the thickness adjusting unit based on the above. The control unit, from the thickness information of said group of bags, when the thickness condition of a predetermined number or more of the bag is determined to be abnormal in said group in a bag, the thickness adjusted in accordance with the determination result The bag-making and packaging machine according to claim 1, which controls the operation of the unit. The control unit controls the operation of the thickness adjusting unit so that the thickness of the bag increases when it is determined that the thickness of the bag is thinner than a predetermined number in the group of bags. The bag making and packaging machine according to 2. 3. The bag making and packaging machine described in item 1. The control unit calculates a moving average of the thickness of the bag from the thickness information, and controls the operation of the thickness adjusting unit based on the calculated moving average, according to any one of claims 1 to 4. The described bag making and packaging machine. The bag-making and packaging machine according to any one of claims 1 to 5, wherein the control unit controls the operation of the thickness adjusting unit so that the thickness of the bag increases or decreases by a minute amount. The bag-making and packaging machine according to any one of claims 1 to 5, wherein the control unit controls the operation of the thickness adjusting unit so that the thickness of the bag becomes a target thickness. The control unit corrects the control amount of the thickness adjustment unit according to the correction value.
The bag-making and packaging machine according to claim 7, wherein the correction value is a preset value or a learning value obtained by machine learning based on the past control history of the control unit. The bag-making and packaging machine according to any one of claims 1 to 8, wherein the control unit ignores the thickness information when the bag is determined to be poorly sealed from the thickness information. The control unit according to any one of claims 1 to 9, wherein the control unit executes interval control that ignores the thickness information of a certain number of the bags created immediately after controlling the operation of the thickness adjustment unit. Bag making and packaging machine. The bag-making and packaging machine according to any one of claims 1 to 10.
A bag-making and packaging system that is arranged after the bag-making and packaging machine and includes a thickness information acquisition unit that acquires the thickness information.

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